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Fire Protection O&P
| Question | Answer |
|---|---|
| How would a technician verify proper operation of a fire extinguishing system? | check pressure gauges on each bottle against a chart, check squib life date, check light in the cockpit for low bottle pressure |
| How would a technician troubleshoot an engine fire detection system? | a push to test button in the cockpit |
| What are the basic inspection requirements for an engine fire extinguisher squib and the safety practices and precautions to be followed? | must be inspected and made sure its in its service life, power to the discharge valve assembly should be disconnected |
| What are the components of a typical fire detection system? | test switch, relay, control box, thermal test unit, amplifier, sensing loops |
| Name 3 common items to look for on a visual inspection of a fire detection system. | cracked or broken loop sections, dents or kinks in loop elements, proper routing |
| Can a thermal switch-type fire detection system indicate a general overheat condition? | No, this is a spot-type fire detection system, and it cannot indicate an overheat condition. |
| Can a thermocouple-type fire detection system indicate a general overheat condition? | No, this is a rate-of-temperature-rise-type of system, and it cannot indicate a general overheat condition. |
| How is a thermocouple-type fire detection system checked for operation? | Current is sent through the heater in the thermal test unit. |
| Does a break in a continuous-loop fire detection system keep the system from detecting a fire? | No, the unit will show a fault when it is tested, but it will still warn of a fire. |
| Does the pressure-type continuous-element fire detector system detect a general overheat condition, as well as a fire? | Yes |
| What are the two most commonly used fire extinguishing agents used for engine fires? | halon 1301, carbon dioxide. |
| What extinguishing agent is used in the high-rate-discharge fire extinguishing systems installed in most turbojet engine installations? | Halon 1301. |
| What happens when the pilot pulls the fire-pull T-handle in the flight deck of a jet transport airplane? | The bottle discharge switch is uncovered and armed, the generator field relay is tripped, fuel is shut off to the engine, hydraulic fluid is shut off to the pump, the engine bleed air is shut off |
| How can a mechanic determine the state of charge of the HRD bottles of fire extinguishing agent? | A pressure gauge on the bottle |
| What method is used to discharge an HRD bottle in a turbine engine installation? | An electrically ignited powder charge blows a knife through the seal on the bottle and discharges the contents. |
| Which type of fire detection system operates on the rate of temperature rise? | The thermocouple system. |
| What is indicated if the yellow blow-out plug of the fire extinguisher system on the side of an engine nacelle is blown out? | The built-in fire extinguishing system has been discharged by normal operation. |
| What is indicated if the red blow-out plug of the fire extinguisher system on the side of an engine nacelle is blown out? | The built-in fire extinguishing system has been discharged by a high temperature condition. |
| How is a pressure-type continuous-element fire detector system checked for operation? | Low-voltage A/C current is sent through the sheath of the detector element. |
Created by:
possumslopper2000
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